Ultrafast Processing of Hierarchical Nanotexture for a Transparent Superamphiphobic Coating with Extremely Low Roll-Off Angle and High Impalement Pressure.

Autor: Teisala H; Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany., Geyer F; Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany., Haapanen J; Laboratory of Physics, Tampere University of Technology, P.O. Box 692, FI-33101, Tampere, Finland., Juuti P; Laboratory of Physics, Tampere University of Technology, P.O. Box 692, FI-33101, Tampere, Finland., Mäkelä JM; Laboratory of Physics, Tampere University of Technology, P.O. Box 692, FI-33101, Tampere, Finland., Vollmer D; Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany., Butt HJ; Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2018 Apr; Vol. 30 (14), pp. e1706529. Date of Electronic Publication: 2018 Feb 27.
DOI: 10.1002/adma.201706529
Abstrakt: Low roll-off angle, high impalement pressure, and mechanical robustness are key requirements for super-liquid-repellent surfaces to realize their potential in applications ranging from gas exchange membranes to protective and self-cleaning materials. Achieving these properties is still a challenge with superamphiphobic surfaces, which can repel both water and low-surface-tension liquids. In addition, fabrication procedures of superamphiphobic surfaces are typically slow and expensive. Here, by making use of liquid flame spray, a silicon dioxide-titanium dioxide nanostructured coating is fabricated at a high velocity up to 0.8 m s -1 . After fluorosilanization, the coating is superamphiphobic with excellent transparency and an extremely low roll-off angle; 10 µL drops of n-hexadecane roll off the surface at inclination angles even below 1°. Falling drops bounce off when impacting from a height of 50 cm, demonstrating the high impalement pressure of the coating. The extraordinary properties are due to a pronounced hierarchical nanotexture of the coating.
(© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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